Reinforcing-bar for concrete structures.



A. THMS, REINFORGING BAR FOR CONGRETE STRUGTURBS APPLIOATION FILED SEPT28, 1907.

Patented. Dec. 1, '1908 A. THUMAS. RBINFORGING BAE PoR CONCRETESTRUCTURES. APPLIOATION ILED SEPT. 28, 1907,

905,480. Patented Dee. `1, 1908.

2 SHEETS-SHEET Z 'Umitnese Inventor @y y um I :ummm

,To all 'whom 'ii @my cm2/nem:

' ii; hmmm that i, AWLA Tix-mmm, c'ii-- man mi? tim United States,residing; im troia.) .in th@ county @if ifajfu, ,Stilte of Bvimiijgaminw liu Haw md usaeui hw )Veilig-Bars U01 and i d@ declare iba). iiif mbf: :i fully cie/m3 md am@ maripu auch Wiii enable L10 which liz @ppm--'the Erima, mfiiice u me? my may e .i x1 .C

The ini/miti.

, wiimui" fiiiggzsi w. which 1M M2' in; impi'wei bm: Fig, 15 :i plain @Wm' itiwf: ifreimiml. membm: with 'the di- 'a'i'ggiaii Shear membarsi@mittal iii" 3. is n zgigiiimimy View m pespectiv@ of a pom-ionfui/tained by 'dicV @im mim w Cim@ 'wil'i smid tension ,member Shear.mamd

iie'as nf :i cifimfzicei" in Qsabiisii, :1 fiim bond bfi'ifvwii iiicemeeufij'uious imdy and the "Lem Simp. numb ,if I

Ch pin' am ivf xfx'ni'ese tha pi'fibabie iin@ oi fracture ,newly atrighi, zngie iiheiecT providing at iie same tim@ for a proper dsti'ibuon01"' shear members in the @onorata sf-ructuie 215110 properly counteract'ihe Sifez'iiii'ig stresses- .Such :x bm: Qi* stime-` Lure ia; simwii'in the diziwings forming a @am mi? iiis Specification; wherein 1 riesigimminent.,

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ami sin pnsiinned and. flying; in i nates the tension member which is aAmetal bar Tshape in cross section, thereby allerding the lateralflanges 2. To enable the attaehment of the shear members to the tensionmember, the flanges 2 are provided with a. plurality of opposed slits 3at an angle of 45 to the axis of the tension member, one of the marginalportions of each et the slits by the operation et' cutting being raisedor curved upwardly, as shown at It, thereby opening the slits so as toallow the tension members to enter freely therein.

'lhe tension members as will be seen on referring to Fie. 7 are formedof vFlat sheet metal of the requisite gage and are lirst eut in straightlengths after which their `end portions 5 are bent upwardly on a lineeross` ing the body portion of the shear member at an angle of' aboute5", said end portions standinf at right angles to the body of the shearmember and parallel to each other with their inner faces insubstantially right angle planes. The length of the body por.

tion G ol the sheer members is equal to the diameter ot the centralportion of the ten sion member, and the shape of the shear members issueh as lo enable their end portions 5 to be entered in the diagonalslits 2l from the under side of the tension member.. while the angle atwhich the end portions ol` the shear members are bent causes said endportions when introduced `in the slits ot the tension member to projectobliquely to the tension member when the body portion t3 ol the shear`members is Caused to lie flatly against the under face olE the tensionmem-Y ber, as shown in Figs. 5, (l and 14, the angle at whie` he endportions of the shear mem-- bers projet-t trom the tension member. beingat about fl-5o to a per} e11dieular. After the shear members shall havebeen placed in the slits of -tlie flanges ot the tension member with thebody portions ot the snear members Crossing; the under l'aee thereof,tihe tension members are securely locked to .fthe shear member bydriving,v or forcing' the upwardly turned nun-grins 4- o't the slitsdownwardly against the inclined sides of the shear members in a planewith the major portion ot' the flanges 2, as elearl y shown in Figs. 5and (l, thereby 'torn'iing an abuttim;` shoulder whieh serves to resistany longiti'idinal lhs-r t upon the shear members in the direetion otthe tension member and lockingy the shear members firmly to the tensionmember.

In the making of eonnnereial bars, the inclined slits for the shearmembers in the flanges ol' the tension member will be located at theprobable point ot' orrori-enne el' the shearinj-l Stress in the beam inwhich the bai` may be placed. Should it be necessary to 'provide torextraordinary resisl'nme against shearing stresses, the slits in the[langes of the tension member may be located that the shear members willbe distributed in the concrete body in. manner to resist or connteraetany predetermined shearing stresses to which the beam or concrete bodymay be subjected. y

By making the slits in the flanges of the tension member diagonal,shown. the shear members when placed therein are caused to assume anineline at an angle el" substantially 45 with respect to the tensionmember, a position in which they are best calculated to traverser theprobable line ot fracture. lt will also be noted that the elr lique formof the slits enables the emi ley ment of shear members ot' a widthgreater sa me time keepingl the shear n'nnnbers within theplane ol` 'thetension men'ioer, allerdinoj the use oi' shear members'ot ,greatertransvv l verse area without increasing th bull; ol' the reinforcing baror addingto its trarrverse diameter, while the angle at which the shearmembers stand in the Concrete body renders them stili' as againstlateral movement and rapahle of. addin-t;r to tht-v 4eompressionresisting; strength of the beam. lt will further be noted that the bodyportion (i of the shear members being emlwdded in the Com-,rete is heldtirinly'to the ander t'aee of the tension member, obi'iati thepossibility ot :nuY displaeemenl of said partf.. lVhere it is desired toproduce the lattirv etleet in the reinforcing struct uro, the lateral-(lang-res of the tension member are slitt-al on opposite sides so thatthe angle ot the slits in pairs will stand in opposite directions. asshown in Fig. lil. permitting the ima1=rporation ol' the shear membersinto the strut-ture in a manner to causo their vtree ein to Cross orlap, as clearly slmwn in Fig'. il, the ar rangnnnent being: sueh as tocause the shear members in eaeh. pair lo stand in opposite dirent ions.

lVlie/re it is desired to supply a eonorete bar or similar strueturewith a tensileH strength greater than that a tlorded by the liarillustrated in lt`igrs. l to 5, such additional tensileslrength may besupplied employing the structure shown in Figs. 87 9, l0 and lib whereintwo angle iron tension members T with diagonal slits S in the lat,M eralflanges 9 thereotl and n Central tension member l() located equidistant.between the central tension members 7, are bound to- ;,rether by theshear member whose body porw tion b is sullieiently long to span betweenthe angle iron Vtension members I and which is provided with an eye l1formed by slitling the body portion longitudinally at its rente andeux-ving the parts divided by said slits in opposite directions, asclearly shown in lig. l0, said eye so formed receiving the ventraltension member l0 whieh passes therethrough while the upwardly extendingl than that of the late 1al 'llai'iges 2; at the lange having narrowslits therein, ajplurall of the ml anges of the tension ifnembers ity ofrelatively thin, Het shear members and pooting therefrom. l() crossingbetween the flanged tension mem- In testimony whereof, I sign thisspecibei's und lying against the under .faces there ication in thepresence of two Witnesses.

of, the ends of said shear members being AVILA THGMS. bent upwardly atsubstantially ri lit angles Witnessest to the body portion thereof ansaid up- 1 0.13. BAENZIGER7' wai-elly bent end portions lying in theslits y G. HOWLETT.-

